Database Management Systems (DBMS)
Which statement correctly explains Data Query Language (DQL)?
Difficulty: Medium
- A. A key formed by combining two or more columns to uniquely identify a row in a table.
- B. A subset of SQL primarily represented by the SELECT statement, used to retrieve data from a database. ✓
- C. A normalization level in which a table is in second normal form and has no transitive dependencies on the primary key.
- D. A set of techniques used in a DBMS to ensure correct results for concurrent transaction operations.
Correct answer
B. A subset of SQL primarily represented by the SELECT statement, used to retrieve data from a database.
Correct answer
Source: Database Management Systems (DBMS) Official Reference Guide
Tags: computer science, dbms, SQL, databases
Submitted by: MCQsHub Editorial
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